Backhoe attachment



D. w. MURRAY 3,353,285

BACKHOE ATTACHMENT Nov. 21, 1967 Filed June 24, 1965 United States Patent ()fifice 3,353,285 Patemtecl Nov. 21, 1967 3,353,285 BACKHOE ATTACHMENT Donald W. Murray, Box 1075, Ketchikan, Alaska 99801 Filed June 24, 1965, Sea. No. 466,523 3 Claims. (Cl. 37-2) This invention relates to attachment devices for power diggers and the like.

It is an object of the present invention to provide a backhoe attachment which will be used in ditching operations to eliminate excessive labor as has been heretofore required in handling buried organic material. In order that a small backhoe machine could handle buried stumps, logs, roots and the like, it was necessary to have a laborer stand by to saw or choke these items in order to lift them clear of the excavation. By adding the present backhoe attachment, it would be possible to eliminate the manual labor completely.

Another object of the present invention is to provide a backhoe attachment which will shear roots up to six inches in diameter as well as grab and pull stumps, logs and large round or irregular rock from the excavation site.

A further object of the present invention is to provide an attachment of the above mentioned type which will be used in burning operations as well as for cold decking logs and for loading or unloading unweildy items of various types.

Other objects of the invention are to provide a backhoe attachment bearing the above objects in mind which is of simple construction, has a minimum number of parts, is inexpensive to manufacture and efficient in operation and use.

For other objects and for a better understanding of the invention, reference may be had to the following detailed description taken in conjunction with the accompanying drawing, in which:

FIGURE 1 is a side view of the present invention shown partly broken away; and

FIGURE 2 is a front view of the attachment shown in elevation and removed from FIGURE 1.

Referring to the drawing in detail, a backhoe attachment made in accordance with the present invention is shown to include a pair of spaced apart side frames 12 secured between a plurality of spaced apart lugs 14 which are fixedly secured to the boom 16 of the backhoe machine (not shown). Side frames 12 are secured to lugs 14 by suitable fastener means and a flat stiffener plate 18 is fixedly secured between side frames 12 and adds to the strength and rigidity thereof. A front plate 20 of rectangular configuration is fixedly secured to the front edges of side frames 12 and a shearing blade 22 is fixedly secured to the underside of plate 20 and to the lower extremity of side frames 12 and provides a means for shearing such items as roots against the digging lip 24 of the scope 26 of the digging machine.

In operation, the digging lip 24 of scope 26, during the digging operation, causes a shearing action against blade 22 when it is slid along the digging lip 24 and a shearing action takes place when sufiiciently soft materials are present, or a grabbing action takes place in the event the material is hard, and plate 20 forms a bucking means for material to be entered into scoop 26 to be removed from the excavation.

It shall be noted that plate 20 extends beyond the sides of side frames 12 and is free to be received within the cavity of scoop 26 without interferring with the digging operation.

While various changes may be made in the detail construction, it shall be understood that such changes shall be within the spirit and scope of the present invention as defined by the appended claims.

What I claim as new and desire to protect by Letters Patent of the United States is:

1. A backhoe attachment comprising, a boom, a scoop pivotally secured to the end of said boom, a digging lip on said scoop, a pair of spaced apart side frames supported by said boom, said side frames providing support means for a shearing blade, a rectangular front plate secured between said side frames providing a means for pushing and urging organic material into said scoop, a stiffener plate carried by said side frames providing a means for increasing the rigidity of said side frames, the upper extremities of said side frames being received between a plurality of lugs secured to said boom, said side frames being secured by suitable fastening means to said lugs, said side frames depending angularly downward and being rigidly secured to said boom by said lugs, said rectangular front plate and said stiffener plate providing maximum rigidity to said side frames so that they do not warp when pressure is placed upon them during a digging operation, said shearing blade being secured to the lower extremity of said side frames and the lower extremity of said front plate at the lower extremity of said side frames, the cutting edge of said shearing blade extending beyond the front surface of said front plate to allow a cutting, grabbing and shearing action of said blade, said digging lip gliding against said shearing blade when said scoop is pivoted downwardly and toward said side frames during the operation of a backhoe machine.

2. The combination according to claim 1 wherein said rectangular plate secured to said blade of said device overhangs said side frames and is freely received within the open cavity of said scoop of said backhoe machine, and the edges are in close proximity with the sides of said scoop and provide a means of urging organic material into said scoop for removal from said excavation.

3. The combination according to claim 2 wherein said side frames of said attachment extend forwardly toward the end of said boom providing a maximum of efficiency when urging said organic matter into said scoop toward the rear of said scoop when said scoop is pivoted toward said side frames of said attachment.

References Cited UNITED STATES PATENTS 2,895,236 7/1959 Pilch 37-2 FOREIGN PATENTS 856,242 3/ 1940 France.

HUGO O. SCHULZ, Primary Examiner. 

1. A BACKHOE ATTACHMENT COMPRISING, A BOOM, A SCOOP PIVOTALLY SECURED TO THE END OF SAID BOOM, A DIGGING LIP ON SAID SCOOP, A PAIR OF SPACED APART SIDE FRAMES SUPPORTED BY SAID BOOM, SAID SIDE FRAMES PROVIDING SUPPORT MEANS FOR A SHEARING BLADE, A RECTANGULAR FRONT PLATE SECURED BETWEEN SAID SIDE FRAMES PROVIDING A MEANS FOR PUSHING AND URGING ORGANIC MATERIAL INTO SAID SCOOP, A STIFFENER PLATE CARRIED BY SAID SIDE FRAMES PROVIDING A MEANS FOR INCREASING THE RIGIDITY OF SAID SIDE FRAMES, THE UPPER EXTREMITIES OF SAID SIDE FRAMES BEING RECEIVED BETWEEN A PLURALITY OF LUGS SECURED TO SAID BOOM, SAID SIDE FRAMES BEING SECURED BY SUITABLE FASTENING MEANS TO SAID LUGS, SAID SIDE FRAMES DEPENDING ANGULARLY DOWNWARD AND BEING RIGIDLY SECURED TO SAID BOOM BY SAID LUGS, SAID RECTANGULAR FRONT PLATE AND SAID STIFFENER PLATE PROVIDING MAXIMUM RIGIDITY TO SAID SIDE FRAMES SO THAT THEY DO NOT WARP WHEN PRESSURE IS PLACED UPON THEM DURING A DIGGING OPERATION, SAID SHEARING BLADE BEING SECURED TO THE LOWER EXTREMITIY OF SAID SIDE FRAMES AND THE LOWER EXTREMITY OF SAID FRONT PLATE AT THE LOWER EXTREMITY OF SAID SIDE FRAMES, THE CUTTING EDGE OF SAID SHEARING BLADE EXTENDING BEYOND THE FRONT SURFACE OF SAID FRONT PLATE TO ALLOW A CUTTING, GRABBING AND SHEARING BLADE WHEN SAID SCOOP IS PIVOTED DOWNWARDLY AND TOWARD SAID SIDE FRAMES DURING THE OPERATION OF A BACKHOE MACHINE. 